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Tangent of a Circle 圓的切線
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
第八周作业
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
画直线等分三角形的面积
判斷球體
Discover Resources
哈里斯螺旋 (Harriss Spiral)
模擬3D物件
Angle of Elevation & Angle of Depression 仰角和俯角
Circumcentre
Copy of 費氏螺旋 (試算表)
数线段
Discover Topics
Vectors 2D (Two-Dimensional)
Means
Integral Calculus
Poisson Distribution
Trapezoid